MG14 - Talk detail |
Participant |
Breton, Rene | |||||||
Institution |
The University of Manchester - Jodrell Bank Centre for Astrophysics, Oxford Road - Manchester - - United Kingdom | |||||||
Session |
BN1 |
Accepted |
Yes |
Order |
7 |
Time |
16:50 | 15' |
Talk |
Oral abstract |
Title |
Spin Precession In The (No-longer) Double Pulsar | |||||
Coauthors | Kaspi, Victoria, M.; Kramer, Michael; McLaughlin, Maura, M.; Stairs, Ingrid, H. | |||||||
Abstract |
PSR J0737-3039A/B is the first and only pulsar-pulsar system to ever be discovered. Its 2.4-hr orbit makes it the most relativistic double neutron star binary known so far and as a consequence it is a formidable testbed for strong-field gravity. Unexpectedly, the double pulsar also provided the first quantitative measurement of geodetic precession from the study of unique radio eclipses of the A pulsar by its companion as a consequence of the nearly perfect edge-on orbit. Spin precession of the companion, pulsar B, has now tilted its spin axis such that its radio beam no longer intercepts our line of sight it was last seen in 2009. The disappearance of pulsar B does not prevent us from seeing pulsar As eclipses and hence we still possess a way of indirectly studying it. In this talk I will report on preliminary results from an extended study of the eclipses covering the period after which pulsar B disappeared. |
|||||||
Pdf file |
||||||||
Session |
BN3 |
Accepted |
Yes |
Order |
7 |
Time |
17:30 | 15' |
Talk |
Oral abstract |
Title |
On Spiders and Binary Pulsars | |||||
Coauthors | Dhillon, Vikram S.; Roberts, Mallory S. E.; van Kerkwijk, M. H | |||||||
Abstract |
In recent years, the fastest growing class of binary pulsars is that containing an energetic millisecond pulsar strongly irradiating a light, semi-degenerate companion orbiting at close proximity from its host. Dubbed spiders because of the cannibalistic behaviour of these pulsar, they in fact subdivide into two sub-classes: black widows and redbacks, which appear to differ only by the mass of the companion the former being a few 0.01Msun while the latter are ~0.2Msun. Among other things these binaries prove to be good for measuring pulsar masses. The few measurements obtained so far indicate that they likely constitute a rather massive sub-population of neutron stars. In this talk, I will discuss highlight recent mass measurements as well as notable behaviours, such as spotty companion surfaces and secular flux changes. |
|||||||
Pdf file |
||||||||